Easily breed any monster for Wublin/Celestial/Amber island.
The simple half are triple, double and single elements asides from some exceptions I’ll get into later. The combination is:
Quad + Triple/Double/Single = The same Triple/Double/Single
This works for any monster this mean Natural, Fire and Magical
For quads the formula is less consistent. Natural quads can be guaranteed to be bred by breeding:
Quad + Rare Quad
Rare natural quads aren’t the hardest to come across but if you don’t have any the basic triple + single combination works well enough on naturals.
Fire and Magical quads are surprisingly easier to duplicate this can be done as shown below:
Tring + Stogg = Tring
Sneyser + Phangeler = Sneyser
Blow’t + Furcorn = Blow’t
Gloptic + Oaktapus = Gloptic
Pladdie + Drumpler = Pladdie
Plinkjou + Fwog = Plinkjou
These combinations are extremely useful though it does sometimes cause unnecessary quads to be bred on accident.
This can be avoided by breeding these certain double elements with the basic single + single way, or for guaranteed results you can use the rare variant with its common counterpart.
This should allow the most difficult statues and vessels to be done within days rather than weeks.